page_title: Atlas of Peculiar Galaxies
section_title: Galaxies with associated rings
hierarchical_section_title: Atlas of Peculiar Galaxies / List of galaxies in the catalog / Amorphous galaxies / Galaxies with associated rings
caption_attribution_description: Arp 148 is the staggering aftermath of an encounter between two galaxies, resulting in a ring-shaped galaxy and a long-tailed companion. The collision between the two parent galaxies produced a shockwave effect that first drew matter into the center and then caused it to propagate outwards in a ring. The elongated companion perpendicular to the ring suggests that Arp 148 is a unique snapshot of an ongoing collision. Infrared observations reveal a strong obscuration region that appears as a dark dust lane across the nucleus in optical light. Arp 148 is nicknamed Mayall s object and is located in the constellation of Ursa Major, the Great Bear, approximately 500 million light-years away. This interacting pair of galaxies is included in Arp's catalog of peculiar galaxies as number 148. This image is part of a large collection of 59 images of merging galaxies taken by the Hubble Space Telescope and released on the occasion of its 18th anniversary on 24th April 2008. About the objectObject nameArp 148, VV 032, Mayall's Object, MCG+07-23-019Object descriptionInteracting GalaxiesPosition (J2000)11 03 53.95 +40 50 59.90ConstellationUrsa MajorDistance450 million light-years (150 million parsecs)About the dataData descriptionThe Hubble image was created using HST data from proposals 10592, 11091, and 6276: A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University), K. Noll (STScI), and J. Westphal (Caltech)InstrumentWFPC2, ACS/WFCExposure date(s)October 9/10, 1995; November 20, 2005; and April 27-29, 2007Exposure time10.3 hoursFiltersF336W (U), F450W (B), F606W (V), and F814W (I)
context_page_description: The Atlas of Peculiar Galaxies is a catalog of peculiar galaxies produced by Halton Arp in 1966. A total of 338 galaxies are presented in the atlas, which was originally published in 1966 by the California Institute of Technology. The primary goal of the catalog was to present photographs of examples of the different kinds of peculiar structures found among galaxies.
context_section_description: As noted above, these ring galaxies may have formed when a companion galaxy passed through
  the ring galaxy. The interaction would produce a wave effect that would first draw matter into the center and then cause it to propagate outward in a ring.
caption: Interacting galaxy pair Arp 148 (Mayall's Object)
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